Automatic safety gage-cock.



J. L. STUDDS.

AUTOMATIC SAFETY GAGE 000K.

APPLIOATION FILED MAY 8, 1909.

Patented Aug. 15, 1911.

23% Enema:

n rrnn STATES PATENT OFFICE.

JULIAN L. STUDDS, 0F ALEXANDRIA, VIRGINIA, ASSIGNOR OF ONE-HALF T0 LEWIS E.

SMOOT, OF WASHINGTON, DISTRICT OF COLUMBIA.

AUTOMATIC SAFETY GAGE-COCK.

Application filed May 8, 1909. Serial No. 494,836.

To all whom it may concern:

Be it knownthat I, JULIAN L. Srunns, a citizen of the United States, residing in Alexandria, in the county of Alexandria and State of Virginia, have invented a new and useful Improvement in Automatic Safety Gage-Cocks, of which the following is a specification.

This invention relates generally to gage cocks for locomotives, and steam boilers in general, and more particularly to a safety check valve to be used in connection with the gage cock for the purpose of preventing the escape of steam from the boiler in case the gage cock valve is removed for any purpose,

or in case the said gage cock should be broken olf flush with the head of the boiler.

Another object of the invention is to provide a gage cock with a safety check valve, so that the seat of the gage cock can be r'e-' ground at any time desired, without letting down the steam pressure in the boiler, and a still. further object is to provide for the intake of the water, and steam at the bottom of the valve, instead of the end or top, and whereby clogging by scum or dirt is avoided, and it is also an object of this invention to provide a packing for the gage cock valve steam, so arranged as to prevent any grit coming in contact with the threads of said stem.

"With these and various other objects in view my invention consists in the novel features of combination and construction, all

of which will be fully described hereinafter and pointed out in the claim.

1n the drawing fornnng a part of thls specification: Figure 1 1s a side elevation showing the device in position for use, a

portion of the boiler head being shown in section. Fig. 2 is a longitudinal sectional view. Fig. 3 is asection on the line 3 3 of Fig. 2. Fig. t is a section on the line 4-4 of Fig. 2. F 5 is a sectional elevation, illustrating a modified construction.

In carrying out my invention, I employ a valve casing 1, which is provided with the usual central chamber 2, from which depends the-discharge or drip pipe 8. The

vinner end of this casing 1 is externally threaded, as shown at 1, for the purpose of screwing the easing into the end of the, boiler, as shown at Fig. 1. This end of the casing is also threaded internally as shownat 5, and .is provided with a seatB, in ad- .vance of the threads 5, and this seat 6 is intended to receive the cone-shaped check. valve 7 for the purpose of cutting oil the escape of steamer water from the boiler, and it will be noted that the valve seat and Specification of Letters Patent. Patented Aug. 15, 1911.

check. valve are arranged entirely within the boiler'head,s0 that in case the gage cock casing should be broken ofi flush with the boiler, as is usually the case, the check valve 7 seating upon its valve-seat 6 would prevent the escape of steam or water from the boiler.

A threaded plug 8, closed at its outer end is screwed into the inner end of the casing 1, this plug 8 having a central bore opening at .the forward end for the purpose of receiving the flattened guide stem 9 which carries the check valve 7. This plug 8 constructed with openings 10, upon its under side, and which lead into the central bore, and through .which steam and water pass into the casing 1, and around the valve 7, when the said valve is opened or moved back from its seat.

The central chamber 2 has the usual et cock seat 2 which is produced at the orward or outer end of the bore 11, which extends from the central chamber to the rear portion of the casing and through vwhich steam and water pass, after passing the valve 7. 13 indicates the pet cock valve stein having the taperod end 13, which seats against the seat 2 for the purpose of cutting ott' the flow of steam or water. The forward portion ofthe stem is threaded, as shown at 14, and is provided with the usual construction of hand-wheel 15. .lhe'threaded portion of .the stem works through a stulting box 16, said stuffing boX being screwed upon the threaded forward end of the casing, and this stutling box, it will be noted, is of dif ferent internal diameters, thereby providing an interior shoulder 16, against which a packing ring 17 rests, said packing ring being held between the shoulder 16 and the end of the pet cock casing, and by means of this construction the valve stem can be thor oughly packed, and all danger'of grit, or any other substance reaching the stem is entirely avoided, and furthermore, the said valve stem can be withdrawn, and inserted again, as often as desired, without repacking, or other inconvenience. The valve stem 13 with its tapered end- 13 will of course. shut off the steam and water, wherever the A while the full steam pressure is on.

said valve is screwed in to seat firmly upon the seat 2 ,'and whenever the engineer desires to test his boiler, he opens the valve, a

sufficient distance, to unseat it. The check valve 7 heretofore referred to, is for the purpose of cutting off the escape of steam, and water in case the pet 006 k valve should he accidentally opened too far, or broken oft entirely, but it will of course be understood that this check valve is to be unseated during the usual operations of the gage cock, and to accomplish this, I provide the check valve with a forwardly projecting stem 12 which is adapted to be engaged by the pin 12?, screwed into the end of the-gage cock valve 13 said stem and pin being of such relative length that a few turns of the handl will serve to open the gage cock, and at'tie same time keep the check valve open,

of turns, then the pin 12* would be drawn out so far, as to permit the valve 7 to be seated, and thereby cut otl the escape of either steam or water. This 'pin 12*? is screwed'into the end of the valve 13 and is made square'in cross section, so as to be readily turned by means of a wrench or pliers.

tions, 1 and 1*, the section 1 carrying thesat'ety check valve 7, and remaining in the boiler head at all times,-while the section l which is in reality a gage .cock proper, can be quickly "and easily removed 'theretroni, It will be noted that these two sections are threaded together for the purpose of making one complete'device. I

The operations as before stated are identically the same:

but should the hand-wheel 15 be given an excessivenuniber By-taking water and steam through the openings 10, from the under side of the P s, working into the valve, than would be the case if the water were taken directly through an end opening.

It will thus be seen that I provide a gage cock with a safety check valve attachment,

which will automatically operate to cut oli' the escape of steam, in case the gage cock casing is removed or broken off, and it will also be noted that the gage cock valve seat can be reground at any timewith the full steam pressure in the boiler, and it will.

there is lessdanger of foreign matter I also be noted that the gage cock stem can be withdrawn and reinserted without repack ing the stem, the packing remaining in place at all times.

Having thus fully described my invention, what- I claim as new and desire to secure by Letters Patent is v In a gage cook, the combination with a casing threaded at its opposite ends, one end being threaded into the boiler, of a plug closed at its inner end, said plug being threaded into.

the inner end of the casing, said plug having an opening in its bottom thereof, a-safety valve seated in the inner end of said casing, the seat for said valve being arranged within the hcado't boiler, a needle valve having a detachable pin adapted to engage the stem of the safety valve, said needle valve being adapted to be seated as the safety valve is opened and vice versa, said needle valve fitting snugly within the casing at the forward end, a stutling box arranged upon sald forward end and a packing held between said end and stulling box, as set forth. 

